Indicating-sector for dividing-heads.



PTENTED JULY 21, 1908. I. VAN HUPFEL, Jn. INDICATING SECTOR FOR DIVIDING HEADS.

APPLIOATION FILED 00T.28,4 1907.

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I. VAN HUPFEL, JR. INDIGATING SECTOR POR DIVIDING HEADS.

APPLICATION FILED 00T. 28, 1907.

PATENTED JULY 21, 1908.

2 SHEETS-SHEET 2.

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- UNITED s'iuiirEs `PA'iENii OFFICE.

ISADORE VAN HUFFEL, JR., OF MISHWAKA, INDIANA; A

INDIGATING-SECTOR FOR DIvIDING-HEADS.

Specification of Letters Patent.

.'Iatented July 21, 1908.

appiaann mea october 2s, 1907. serial N9. 399,421. i t

useful Im rovement in Indicating-Sectors for Dividin eads, and declare the following to l .be a fu clear, and exact descri tion of the same, such as will enable others s ed in the ertains to make and use the .'same, reference ein had to theaccompanyart to which it ing drawings, which orm a partv of' this specication;

Dividing heads, such as arecommonly used on millin machines, ear cutters and the like in or er to accurate y position the work,4 are usually provided with adjustable sectors for marking various angular sub-divisions upon the head beginning at any desired oint thereon. 'The/heads are usually 'rogided with a plurality of seriesfof small oles arran ed .in concentric. circles, the holes in each practicable.

circ e being spaced at equal distances alpart andthe spacing between the holes in eac series being differenti In order to give the dividing head 'a wide range it is necessary to y large number of these circular series of holesA and the circles are therefore laced as closely together as is he sector usually consists of a pair of arms revolubly connected to ether so as to be movable independently 'o each A other about the center of the dividin head and the adjustment of the sector is e e'cted. by placing one ofthe arms in roximity to one of the holes in the head, Yten counting the desired number of consecutive holes 'in the same' series as the first hole and brin gui the holes thus counted. The two arms of the sector are then clamped togetherand the sector as a whole may be rotated into anyde sired position u on the dividin head. .Themultiplicity of oles in the dividing head is very confusing to the avera e vintelligent workman, and, particularly wA enattem ting to count a considerable number'of ho es in an intermediate series, there .is great danger .of accidentally passing froml one circle to an ad'acent circle, thereby producing a wron ger o? mistakes isso great that -a workman always counts the holes at least twice, before locking the arms of the sector together, in order to insure alproper measurement. Not

` only must the hoes be counted -several times a justment of the sector. The danin order to insure correctness, but the count-V the sector may be quickly and 'conveniently f made without necessity of counting holes or divisions on the dividing head.

A further object of the resent invention is to provide a novel adjusta le sector for use in connection with `dividing heads, wherein the range of the sector is clearly indicated so that a workman can at-all times apprise himself of the 'adjustment of the. sector by simply glancing at the indicator.

The various features of novelty whichl characterize my invention will .be hereinafter pointed out with particularity in the claims,

ut for a full understanding of my invention, and of its various v-ob'ects and advantages, reference may. be ha tailed `description taken in connection with the accompanying drawing, wherein:

Fi ure 1 is acentral cross sectiin through the ividing head of a machine having thereon a sector arranged in' accordance with the present invention; Fig. 2 is a section taken on line 2 2 of Fig. 1 looking 'm the direction of the arrows; Fig. 3 is a view similar to Fig. 2 showing, however, adiferent adjustment of the sector ;v Fig. 4 is a fragmentary view on anenlarged'scale of a portion of the sector; Fig. 5 is a view\similar -to 4 with one of the sections of the sector removed; and Fig. 6 is a front view ofa modified forinjofsector.

'In the drawings l have illustrated my 1n-, vention as applied to a dividing head. for a milling machine and in the descri tion I l shall refer particularly to this form o my into the .following devention; but it will, of course, be understood. .f

an arm D whereby the s aft maybe rotated.

The head isprovided in its face with a numbery ofseries of holesarranged in the form of circles a' to a" inclusive. 7 'of these circles are shown it will, of course,

be understood that the present invention is not confined 4to any particular numberof Although l 110 such circles. 'lhe outermost circle contains sixty six holes, the innermost-fifty. three holes, and the remaining circles contain intermediate numbers of holes; The holes in each circle are e ually s aced so that the outermost circle ividest e head into sixty six arts, while the innermost circle divides the ead into fifty three parts. -A

The shaft C controlsthe position of the work and the 'position of the work is changed by rotating the shaft through the handle DL vThe handle'is provided with a pin d which is of such diameter-as to be capable of entering anv one of the holes in the dividing head. It will be seen that when the pin is located in any one of4 the holes the shaft is locked against rotation and the work is accordingly held rigidly in its adjusted positionn order that the pin mayr be carried radially of the head so as to register'with the holes in any of the circles, the handle is provided with an elongated lslot d which permits it to be radially adjusted upon the end ofthe shaft.

All ofthe above parts are of old and well known construction and no detailed description is therefore deemed'necessary.

Itis necessary to provide some means for conveniently measuring the arc through which the Ihandle is to travel whenever it is desired to move the handle. successively through a number of equal arcs of less than 360 'degrees or an even multiple of 360 degrees, vin order to save the Workmen the trouble of counting a certain number of holes in one of'the circles whenever the handle is shifted. .To this end I have devised a novelform of adjustable sector .which may be vquicklyvand conveniently adjusted to mark 0E any of the angles which 1s measured by any number o f holes in any of the circles, without danger of error. `The particular form of sector illustrated consists of two disks E and F each of which has a diameter slightly smaller than the diameter of the innermost circle of holes on the dividing head.

These-disks are revolubly mounted concentrically with. the head-in an suitable manlOcked'tOgether.

be held in place' againsthe face of the divid-4 ner, as for example, the disk surrounds the end of the hub b which carries the head; and

' the'disk F ma be mounted upon a hub E on the disk E. 2-is a screw carried'by the hub E"'in such position that its head'may overlap i theinner edge of the Ydisk F. When the screw is loosenedvthe twd disks may b e revolved inde endent of each other and when the screw 1s tightened the two disks lare The sector as a whole may ing head in any suitable manner, as for eX- ample by means of ac'ollar c arranged upon the shaft C between the disk F and the handle D. Eis provided with a radially extendin arm e whlle the diskl F hasa similar arm these arms beingof such len th as to extend across the several circles of oles. Y

The disk E is provided with a plurality of series of numbers arranged int e form of concentric circles, e to e7, -there being as man ofthese circles as there are circles on the ividin head. There are as many numbers in each `circle as there are holes in the correspondingv Icircle of the dividing head, and the numbers in each case are run con,- secutively beginning with unity.- It will thus be vseen that the disk E is a reproduction ofthe dividing head on a smaller scale, except that instead of the holes in the dividing head the disk is marked with the numbers corresponding to the holes. Thesecond disk -of thesectorcovers the numbers but is ro- .brought together, namely so as to engage with the in d on o posite sides thereof, the

-inal num er of eac series is visible through Each of the windows is one of the windows. marked with a designating character so as t o associate it' with one of the circles on the head, thus thewindow fhas arranged on opfposite'sides thereof the number sixty six, in 4i'cating that this window is to be used in connection with circle having sixty six holes: namely the circle a. window f7 has marked on o posite sides thereofthe number 53, indicating that this window is tobe used in connection with the innermost circle a of the dividing head. It

In the same way the I.

will be seen that the final number'ofeach series is al/so thezero point ofthe series.

lWhen it is 'desired to adjust the sector so as `to mark offany desired angle on the head,

beginning with the hole in which the pin d happens to be located, the' two arms e and f are rought towardv each other `until they engage -with the pinyand the arm-f is then movedaway from the pin until the proper number ap' ears through one of the windows.' The screw sector moved as a whole to properly position the handle at .various points around 4the di- 2 may now be tightened andthe -A viding head. Thus, for example, if it is desired to move thehandle a number 'oftirnres holes 1nl the outermost circle or through one or more revolutions in addition to this number of holes, the sectoris adjusted until the through an'ang'le' corresponding to fourteen i numeral fourteen shows through the window marked 66. In the same way if the measurement is to'be madefrom an other circle, y the adjustment of the sector-1s effected by preducingnav relative movement between the parts thereof until the number corresponding to the desired number of holes shows through the windowcorres onding to the circle, of holes from which t e measurement is' to be' determined. It will-thus be seen that the y confusion which ordinarily resultsfrom an effortto count a predetermined number ofv holes in any circle` on thedividing head is entirely avoided, since it is only necessary vfo r the workman to bring Vthe sector to the zero position and then to move the arms `thereof a art until the desired number ap ars under t e window which is marked wit the same number as the number of holesv in the circle which is being used to give the desired angle.

In Figs. 1 to 5 I have shown the final numbers of the series arran ed along a radial line; the windows are thereore also arranged in a radial line. It is, of course, unnecessar that -this particular arrangement be em idyed, and in fact, it may in some instances lib preferable to have the final numbers, namely the zero points, arranged 1n stag ered relation; the Wmdows being therefore a so arranged in staggeredrelation so that all of the final numbers Will show simultaneously through their windows. In such an arrangement ,each window may beisolated from the others so that all chance of confusion Vis avoided. When the windows are arranged in stag ered relation it is possible to place the circ es of` numbers closer together than is the case where the Windows are all arranged in single radial line; this being of advantage where it is desired to give to the sector as Wlde a range as ossible. t

n Fig. 6 I have shown a front view of the sector which' is similar in all respects to the sector shown in the other iigures, except that the numbers are so arranged that the Windows are distributed around the outer disk. The two members of the sector are indicatedvby 'the reference characters G and H respectively,

and the windows by the characters h to 71,7.

has been adjusted and moved into the desired position upon the dividing head, aA sli page occurs, so that the accuracy of t e 40 measurement is defeated. In order to prevent such slippage I have provided a locking dog Iwhich 1s connected' to the arm e of the sector by means of an adjustable screw 1l which passes through an elongated slot i in the member I. The free end of the member I is provided with a in i2 which is adapted to .y

drop into one of t e holes in the dlviding head. After the sector has been brought -to the desired position the screw i -is'loosened and the locking dog may then be ad'ustcd so as to bring the pin i2 into one of t e holes. When the screw 1s againtightened the sector is locked against displacement.

Havin now fully described my'invention,

what I 'c aim as new and desire to secure by Letters Patent is:

1. 'The combination with a-calibrated dividin head having thereon a plurality of series o divisions arranged in the form of conl centric circles, of an adjustable sector for marking angles onsaid head, said sector being provided with means for .indicating the angle marked thereby in terms of Y exact multi les oi the divisions contained in any of the a oresaid circles. i

oscillation about the center of said circle, said It sometlmes happens that after a sector 2. The combination with a dividing head having marked thereon a ,series f groups of angles, the sum of the angles of each oup beingequal to 360 degrees and the ang es in each group being different from those in the n other grou s, of an adjustable sector 'for marking o any desired number' of said angles at any-desired point upon the head, said sector bein provided with means for indicating the an d act multip es ofthe angles in any group.

3. The lcombination with a dividing head having thereon a plurality of groups of divisions, the divisions of each group being arranged in the formI of a circle concentric with the other circles and the spacing of the divisions ineach grou being different from the s acing of the divisions in the other groups, o? an adjustable sector for marking olf any desired portion .of said head beginning at any desired division, said sector having thereon a series of grou s of consecutive numbers each beginning wit unity and equaling in number the- 'number of divisions in one of the aforesaid groups of divisions, together with an index coperating with said numbers so as to designate the number corresponding to the number of divisions of an group contained in the portion marke off by the sector. A

I 44. The combination with a dividing head having a series of equally-s aced divisions thereon arranged ina circle o a air of radial arms pivotally connected so as to e capable of arms being provided with concentric`disks lying one upon the other, one of said disks .having thereon a series of equally-spaced consecutive numbers beginning with unity and ,equaling numericall the divisions on said head, said numbers eing arranged in a circle concentric with said divisions, and the other of said disks having an opening therein through which any one of 'said numbers may be made `visible-by moving the arms from or toward each other.

5. In combination, a dividing head having thereon a series of equally-spaced divisions arranged in the form of a circle, a pair of relatively-movable revoluble superposed disks, one of said disks having thereon a series of equall -spaced numbers beginning with unity an e ualing numerically the divisions on said hea said numbers beingarranged in a circle" concentric with the aforesaid circle, the other disk having a window through which any one of said numbers may be made visible, and a radiallyrojecting arm on each of said'djsks arrange to traverse the divisions on said head, said arms being so placed .that when they are closest to each other the extreme number of the series shows through said window. f

6. In combination, a dividin head having thereon a plurality of series o divisions are marked thereby interms of ex- 15 i ranged in the form of Iconcentric circles; a

disk revolubly mounted adjacent saidhead .and having thereon a plurality of series of consecutive numbers arranged in the form of 'circles concentric with the aforesaid circles,

each of said series of numbers beginning with unity and equaling numerically the divisions of one' of the series of divisions on the head; a

Isecond disk superposed u on the rst disk and revoluble relatively t ereto about the center of'said circles, said second disk being arranged to cover the numbers on the iist disk and having windows therein through each Aof which one of the numbers of a series may' be exposed; said disks each having a radial arm and the arrangement being such that when said arms are brought into roxiinity to each other the inal number o each series is exposed through one of the Windows.

7. The combination with a dividing head having thereon a plurality of series of divisions arranged in the form of concentric circles, a disk revolubly mounted adjacent said head and having thereonv a plurality of series of consecutive numbers arranged in the forman arm extending radially from said disk' across said head; a second radial arm pivoted so as to be rotatable about the center of said disk, and indexes on said second arm arranged to coperate with said circles of numbers.

In' testimony whereof, I, sign this specifi cation in the presence of two Witnesses.

JISADORE VAN HUFFEL, JR.

Witnesses:

J MCMILLAN, g BERTHA FRIEDMAN. 

